An arterial ulcer is caused by ischemia, characterized by a "punched-out" appearance, pale base, and associated signs of arterial insufficiency (e.g., absent pulses, coolness), and is typically very painful.
This begins as a waxy, yellowish plaque that may later ulcerate, a different primary morphology than a primary neuropathic ulcer.
This is an inflammatory ulcer distinguished by its rapid expansion and characteristic violaceous, undermined border.
A venous ulcer is located in the "gaiter area" above the medial ankle and is surrounded by signs of chronic venous disease like edema and hemosiderin staining, a different location and context than a pressure-point neuropathic ulcer.
